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Drum machine · gpt-5.6-luna-pro

Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM.

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transcript · 4 messages
user

Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM.

assistant
thinking
**Creating index.html**

I’m focusing on creating an index.html file. I need to check the current working directory and implement a polished design. I’ll write the file while ensuring that all sounds synth with WebAudio. I want a grid that’s 4x16 and clickable, set to BPM. Maybe I should also consider adding transport controls, a visual playhead, and keyboard functionality. It seems like a single file approach might be the best way to craft this!
write /tmp/ws/index.html (10023 bytes)
toolResult

Successfully wrote 10023 bytes to /tmp/ws/index.html

assistant

Created `/tmp/ws/index.html` — a self-contained 16-step drum machine with: - Clickable kick, snare, hi-hat, and clap sequencer grid - Web Audio API synthesized sounds - Play/stop controls - Adjustable BPM from 60–180 - Current-step highlighting - Clear pattern button - Spacebar play/stop shortcut - Responsive styling with no external resources

TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelgpt-5.6-luna-pro
vendorOpenAI
harnesspi-agent
generated2026-08-01

EVALUATION

4/5 working

16-step drum machine grid with kick/snare/hi-hat/clap, play/stop toggling via space, step indicator advancing, BPM slider present.

Vision grade · anthropic/claude-sonnet-5

MEASUREMENTS

Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.

idle motion0.0%
on click0.2%
on drag0.0%
on wheel0.0%
on enter + space1.9%
on arrow keys2.3%
on w/a/s/d2.2%
frame spread34.6 / 255
console errors0
js errors none

METRICS

runtime28.5s
tokens in11k
tokens out3.9k
cached13k
cost / run$0.0180